<template>
  <div id="app">
    <div class="container">
      <!-- 顶部框模块 -->
      <div class="form-group">
        <div class="input-group">
          <h4>品牌管理</h4>
        </div>
      </div>

      <!-- 数据表格 -->
      <table class="table table-bordered table-hover mt-2">
        <thead>
          <tr>
            <th>编号</th>
            <th>资产名称</th>
            <th>价格</th>
            <th>创建时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody>
          <!-- 一.循环遍历数组 ,把数据铺设到页面上 -->
          <tr
            v-for="(obj,index) in list"
            :key="obj.id"
          >
            <td>{{obj.id}}</td>
            <td>{{obj.name}}</td>

            <!-- 如果价格超过100，就有red这个类 -->
            <!-- 2.如果商品价格大于100 就动态class 添加颜色 -->
            <td :class="{red:obj.price > 100}">{{obj.price}}</td>
            <td>{{obj.time | dateFormate}}</td>
            <td><a
                href="#"
                @click.prevent="delBtn(index)"
              >删除</a></td>
          </tr>
        </tbody>

        <tfoot v-if="list.length === 0">
          <tr>
            <td
              colspan="5"
              style="text-align: center"
            >暂无数据</td>
          </tr>
        </tfoot>

      </table>

      <!-- 添加资产 -->
      <form class="form-inline">
        <div class="form-group">
          <div class="input-group">
            <input
              type="text"
              class="form-control"
              placeholder="资产名称"
              v-model.trim="name"
            />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <div class="form-group">
          <div class="input-group">
            <input
              type="text"
              class="form-control"
              placeholder="价格"
              v-model.number="price"
            />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <!-- 阻止表单提交 -->
        <button
          class="btn btn-primary"
          @click.prevent="addBtn"
        >添加资产</button>
      </form>
    </div>
  </div>
</template>

<script>

export default {
  data () {
    return {
      name: "", // 名称
      price: 0, // 价格
      list: [
        { id: 100, name: "外套", price: 199, time: new Date("2010-08-12") },
        { id: 101, name: "裤子", price: 34, time: new Date("2013-09-01") },
        { id: 102, name: "鞋", price: 25.4, time: new Date("2018-11-22") },
        { id: 103, name: "头发", price: 19900, time: new Date("2020-12-12") },
      ],
    };
  },

  methods: {
    //二. 添加商品
    addBtn () {
      // 判断内容是否为空,如果是空那么提示
      if (this.name.length == 0 || this.price === 0) {
        alert('不能为空')
        return
      }
      // 判断id 如果有数据那就使用list里的id数加一,如果list里面没有数据那就默认使用100
      let id = this.list.length === 0 ? 100 : this.list[this.list.length - 1].id + 1
      this.list.push({
        id: id,
        name: this.name,
        price: this.price,
        time: new Date()
      })
    },
    // 删除数据
    delBtn (ind) {
      this.list.splice(ind, 1)
    }
  },
};
</script>

<style >
.red {
  color: red;
}
</style>